Do a quick selftest on in the interoperability of dma_fence_wait on a
i915_gem_request.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
---
drivers/gpu/drm/i915/selftests/i915_gem_request.c | 61 +++++++++++++++++++++++
1 file changed, 61 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_request.c b/drivers/gpu/drm/i915/selftests/i915_gem_request.c
index 3cbf4735fe2f..6fa148b4ff30 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_request.c
@@ -119,11 +119,72 @@ static int igt_wait_request(void *arg)
return err;
}
+static int igt_fence_wait(void *arg)
+{
+ const long T = HZ / 4;
+ struct drm_i915_private *i915 = arg;
+ struct drm_i915_gem_request *request;
+ int err = -EINVAL;
+
+ /* Submit a request, treat it as a fence and wait upon it */
+
+ mutex_lock(&i915->drm.struct_mutex);
+ request = mock_request(i915->engine[RCS], i915->kernel_context, T);
+ if (!request) {
+ err = -ENOMEM;
+ goto out_locked;
+ }
+ mutex_unlock(&i915->drm.struct_mutex); /* safe as we are single user */
+
+ if (dma_fence_wait_timeout(&request->fence, false, T) != -ETIME) {
+ pr_err("fence wait success before submit (expected timeout)!\n");
+ goto out_device;
+ }
+
+ mutex_lock(&i915->drm.struct_mutex);
+ i915_add_request(request);
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ if (dma_fence_is_signaled(&request->fence)) {
+ pr_err("fence signaled immediately!\n");
+ goto out_device;
+ }
+
+ if (dma_fence_wait_timeout(&request->fence, false, T / 2) != -ETIME) {
+ pr_err("fence wait success after submit (expected timeout)!\n");
+ goto out_device;
+ }
+
+ if (dma_fence_wait_timeout(&request->fence, false, T) <= 0) {
+ pr_err("fence wait timed out (expected success)!\n");
+ goto out_device;
+ }
+
+ if (!dma_fence_is_signaled(&request->fence)) {
+ pr_err("fence unsignaled after waiting!\n");
+ goto out_device;
+ }
+
+ if (dma_fence_wait_timeout(&request->fence, false, T) <= 0) {
+ pr_err("fence wait timed out when complete (expected success)!\n");
+ goto out_device;
+ }
+
+ err = 0;
+out_device:
+ mutex_lock(&i915->drm.struct_mutex);
+out_locked:
+ mock_device_flush(i915);
+ mutex_unlock(&i915->drm.struct_mutex);
+ return err;
+}
+
int i915_gem_request_mock_selftests(void)
{
static const struct i915_subtest tests[] = {
SUBTEST(igt_add_request),
SUBTEST(igt_wait_request),
+ SUBTEST(igt_fence_wait),
};
struct drm_i915_private *i915;
int err;
--
2.11.0
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